THE EASTERN IRANIAN WORLD
many of its revolutions and crises of
power.
It is particularly important
in the age of the Saljuqs, when the sultans were never able satisfactorily
to resolve this tension in their empire.
Whilst
it is
true
that
the coming of the Saljuqs inaugurated the age
of
alien,
especially Turkish, rule, the change was not absolutely abrupt.
We
shall first of all be concerned with the eastern Iranian world, com-
prising Khurasan, the adjoining regions of modern Afghanistan, and
the lands of the Oxus and Syr Darya basins. At the opening of the
5th/nth century, the Iranian world still extended far beyond the
Oxus,
embracing the regions of Khwarazm, Transoxiana (called by the
Arabs
Ma
ward*
al-nahr,
"the lands beyond the river"), and Farghana.
In pre-Christian and early Christian times the Massagetae, the Sakae,
the
Scyths,
the Sarmatians, and the
Alans—all
Indo-European peoples—
had roamed the Eurasian steppes from the Ukraine to the
Altai.
The
pressure of Altaic and Ugrian peoples from the heartland of Central
Asia
and Siberia gradually pushed the limits of Indo-European occu-
pation southwards, but until the end of the 4th/ioth century the lands
along
the Oxus and south of the
Aral
Sea, together with the middle and
upper reaches of the Syr Darya as far as its sources in the slopes of the
T'ien
Shan, were still generally ruled by royal dynasties or local princes
who
were apparently Iranian. The picture presented by the holders of
power
is
thus
relatively straightforward, except
that
the Iranian names
and titles of petty rulers and local landowners
(dihqdns)
in such frontier
regions as Isfijab, Ilaq, and Far
ghana do not make it absolutely certain
that
they were racially Iranians. However, a demographic analysis of
the whole population in this Iranian-ruled area involves certain
diffi-
culties.
From the earliest times Transoxiana has been a corridor through
which
peoples from the steppes have passed into the settled lands to the
south and west;
thus
history and geography have worked against an
ethnic homogeneity for the region. Whether the invading waves have
receded or been swallowed up in the existing population, a human
debris has inevitably been left behind. This was undoubtedly the
origin
of the Turkish elements in eastern Afghanistan, for these
Oghuz
and Khalaj were nomads on the plateau between Kabul and
Bust
when Muslim arms first penetrated there in the early centuries of
Islam, and they survived as an ethnic unity throughout the periods of
the Ghaznavids, Ghurids, and Khwarazm-Shahs. It has been plausibly
argued by J. Marquart
that
these Turks were remnants of peoples
brought from
north
of the Oxus by the confederation of the Ephthalites
3
1-2